The second full public beta of the .NET Framework 3.5 came out this week. The final version should be out sometime around the end of the year. Unlike previous releases, I can't find an online link to the release notes or known issues. I'll update this post later if I come across it. Here is the direct download:
Update: Thanks to Jin Miao for finding links to the release notes.
The link for the .Net Framework 3.5 Beta 2 readme is: http://download.microsoft.com/download/D/D/1/DD18043A-FE86-4F57-AC22-791B30E6F04B/dotNetReadme.htm#Windows%20Communication%20Foundation%20(WCF)
The link for the Visual Studio Beta 2 readme is: http://download.microsoft.com/download/d/d/1/dd18043a-fe86-4f57-ac22-791b30e6f04b/VSReadme.htm
When Orcas Beta 2 was released, all of the links for samples were still pointing to the Beta 1 SDK download
The Windows SDK (formerly Platform SDK) is now available in an iteration that supports our Orcas Beta